Intel 855GME Design Manual page 145

®
Intel 855GME Chipset and Intel
Figure 72. Topology Command Signal to Clock Trace Length Matching Diagram
GMCH Package
855GME
GMCH
Die
Note: All lengths are measured from GMCH die
pad to DIMM connector pad.
GMCH Package
855GME
GMCH
Die
Note: All lengths are measured from GMCH die
pad to DIMM connector pad.
®
6300ESB ICH Embedded Platform Design Guide
System Memory Design Guidelines (DDR-SDRAM)
DIMM0
SMA[12:6,3,0]
SBA[1:0],
SRAS#, SCAS#,
SWE
#
SCK[2:0]
SCK#[2:0]
DIMM0
SMA[12:6,3,0]
SBA[1:0],
SRAS#, SCAS#,
SWE
#
SCK[5:3]
SCK#[5:3]
January 2007
CMD Length = Y0
(X0 – 1.5") ≤ Y0 ≤ (X0 + 1.0")
Clock Reference Length = X0
DIMM1
CMD Length = Y1
(X1 –1.5") ≤ Y1 ≤ (X1 +1.0")
Clock Ref Length = X1
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